翻訳と辞書 Words near each other ・ Very Small Business (TV series) ・ Very Small Records ・ Very smooth hash ・ Very Special (song) ・ Very special episode ・ Very special relativity ・ Very Subtle ・ Very Tall ・ Very Together ・ Very Tough Love ・ Very Tricky, Alfie Atkins ・ VERY TV ・ Very Up & Co ・ Very Warm for May ・ Very Young Girls ・ Very-high-bit-rate digital subscriber line ・ Very-high-bit-rate digital subscriber line 2 ・ Very-high-density cable interconnect ・ Very-high-energy gamma ray ・ Very-high-temperature reactor ・ Very-large-scale integration ・ Very-long-baseline interferometry ・ Very-long-chain (3R)-3-hydroxyacyl-(acyl-carrier protein) dehydratase ・ Very-long-chain 3-oxoacyl-CoA reductase ・ Very-long-chain 3-oxoacyl-CoA synthase ・ Very-long-chain acyl-CoA dehydrogenase ・ Very-long-chain enoyl-CoA reductase ・ Very-low-drag bullet ・ Very-small-aperture terminal ・ Veryan Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Very-high-bit-rate digital subscriber line ： ウィキペディア英語版 Very-high-bit-rate digital subscriber line Very-high-bit-rate digital subscriber line (VDSL or VHDSL)〔(【引用サイトリンク】publisher=KPN )〕 is a digital subscriber line (DSL) technology providing data transmission faster than asymmetric digital subscriber line (ADSL) over a single flat untwisted or twisted pair of copper wires (up to 52 Mbit/s downstream and 16 Mbit/s upstream),〔(【引用サイトリンク】publisher=HowStuffWorks )〕 and on coaxial cable (up to 85 Mbit/s down- and upstream)〔(【引用サイトリンク】publisher=EtherWAN )〕 using the frequency band from 25 kHz to 12 MHz.〔(【引用サイトリンク】publisher=ITU )〕 These rates mean that VDSL is capable of supporting applications such as high-definition television, as well as telephone services (voice over IP) and general Internet access, over a single connection. VDSL is deployed over existing wiring used for analog telephone service and lower-speed DSL connections. This standard was approved by ITU in November 2001. Second-generation systems (VDSL2; ITU-T G.993.2 approved in February 2006) use frequencies of up to 30 MHz to provide data rates exceeding 100 Mbit/s simultaneously in both the upstream and downstream directions. The maximum available bit rate is achieved at a range of about 300 meters; performance degrades as the loop attenuation increases. ==Development== The concept of VDSL was first published in 1991 through a joint Bellcore-Stanford research study. The study searched for potential successors to the then-prevalent HDSL and relatively new ADSL, which were both 1.5 Mbit/s. Specifically, it explored the feasibility of symmetric and asymmetric data rates exceeding 10 Mbit/s on short phone lines. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Very-high-bit-rate digital subscriber line」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.